4CLT/48 Maserati 4CLT 1.5 L4s Louis Chiron 1-2, 4, 6-7 Franco Rol 2, 6-7 Scuderia Enrico Platé Maserati 4CLT/48 Maserati 4CLT 1.5 L4s Emmanuel de Graffenried 1-2, 4, 7 Prince Bira 1-2, 4, 7 Scuderia Milano Maserati 4CLT/50 Milano Maserati 4CLT 1.5 L4s Felice Bonetto 1, 4, 6-7 Franco Comotti 7 Joe Kelly (prywatnie) Alta GP Alta 1.5 L4s Joe Kelly 1 Geoffrey Crossley (prywatnie) Alta GP Alta 1.5 L4s Geoffrey Crossley 1, 5 Raymond Mays (prywatnie) ERA D ERA 1.5 L6s Raymond Mays 1 Scuderia Achille Varzi Maserati 4CLT/48 Maserati 4CLT 1.5 L4s José Froilán González 2, 6 Nello Pagani 4 Horschell Racing Corporation Cooper T12 JAP 1.1 V2 Harry Schell 2 Equipe Gordini Simca-Gordini 15 Gordini 15C 1.5 L4s Robert Manzon 2, 6-7 Maurice Trintignant 2, 7 Pierre Levegh (prywatnie) Talbot-Lago T26C Talbot 23CV 4.5 L6 Pierre Levegh 2, 5-7 Peter Whitehead (prywatnie) Ferrari 125 Ferrari 125 1.5 V12s Peter Whitehead 2, 6-7 Scuderia Ferrari Ferrari 125275375 Ferrari 125 1.5 V12s Ferrari 3.3 V12 Ferrari 4.5 V12 Luigi Villoresi 2, 4-6 Alberto Ascari 2, 4-7 Raymond Sommer 2, 4 Dorino Serafini 7 Écurie Espadon SVA ?